Cachet/app/models/Metric.php

<?php

	use Watson\Validating\ValidatingTrait;

	class Metric extends Eloquent implements \Dingo\Api\Transformer\TransformableInterface {
		use ValidatingTrait;

		protected $rules = [
			'name'          => 'required',
			'suffix'        => 'required',
			'display_chart' => 'boolean',
		];

		protected $fillable = ['name', 'suffix', 'description', 'display_chart'];

		/**
		 * Determines whether a chart should be shown.
		 * @return bool
		 */
		public function getShouldDisplayAttribute() {
			return $this->display_chart === 1;
		}

		/**
		 * Get the transformer instance.
		 *
		 * @return ComponentTransformer
		 */
		public function getTransformer() {
			return new MetricTransformer();
		}
	}